Got the rust off the CVD's...
Ballcups. RPM knows how to make them. HPI does not. The ones pictured at the bottom are from HPI. They function for the most part... As long as the truck doesn't hit anything. Anything at all. Otherwise, they pop right off. Curbs, pylons, rocks, tall grass... The ones on top are the much more robust RPM ballcups:
Now, it's a good time to address the MT's threaded rods. Like the stock ballcups, they work, but you have to disconnect at least on end to lenghten or shorten them with the ballcups attached... HPI's titanium turnbuckles are a very worthwhile upgrade:
Next up is the attachment of the front lower bulkhead assembly:
So about the rusty CVD's... Good as new.

. They're a major imporvement over the the noisy, rattly stock dogbones at the bottom. Much smoother and much quieter.
The completed knuckles and carriers with CVD's installed:
And the completed front end: